Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Efremov, Dmitri V."'
Autor:
Feya, Oleg D., Efremov, Dmitri V.
We report a systematic study of low energy metastable states in van der Waals semimetals TiS2, TiSe2 and TiTe2 within the DFT theory by means the evolutionary search algorithm. We find a big difference between TiSe2, TiS2 and TiTe2 in low energy meta
Externí odkaz:
http://arxiv.org/abs/2111.09577
Autor:
Baek, Seung-Ho, Ok, Jong Mok, Kim, Jun Sung, Aswartham, Saicharan, Morozov, Igor, Chareev, Dmitriy, Urata, Takahiro, Tanigaki, Katsumi, Tanabe, Yoichi, Büchner, Bernd, Efremov, Dmitri V.
Publikováno v:
npj Quantum Materials 5, Article number: 8 (2020)
The interplay of orbital and spin degrees of freedom is the fundamental characteristic in numerous condensed matter phenomena, including high temperature superconductivity, quantum spin liquids, and topological semimetals. In iron-based superconducto
Externí odkaz:
http://arxiv.org/abs/2001.02079
Publikováno v:
Phys. Rev. B 101, 035115 (2020)
We derive an S=1 spin polaron model which describes the motion of a single hole introduced into the S=1 spin antiferromagnetic ground state of Ca2RuO4. We solve the model using the self-consistent Born approximation and show that its hole spectral fu
Externí odkaz:
http://arxiv.org/abs/1910.01605
Publikováno v:
Phys. Rev. B 100, 014205 (2019)
We develop a theory of the phonon mediated Casimir interaction between two point-like impurities, which is based on the single impurity scattering T-matrix approach. Within this, we show that the Casimir interaction at $T = 0$ falls off as a power la
Externí odkaz:
http://arxiv.org/abs/1812.09004
Publikováno v:
Phys. Rev. B 98, 161410 (2018)
The Casimir effect, a two-body interaction via vacuum fluctuations, is a fundamental property of quantum systems. In solid state physics it emerges as a long-range interaction between two impurity atoms via virtual phonons. In the classical limit for
Externí odkaz:
http://arxiv.org/abs/1809.11071
Autor:
Iida, Kazumasa, Grinenko, Vadim, Kurth, Fritz, Ichinose, Ataru, Tsukada, Ichiro, Ahrens, Eike, Pukenas, Aurimas, Chekhonin, Paul, Skrotzki, Werner, Teresiak, Angelika, Huehne, Ruben, Aswartham, Saicharan, Wurmehl, Sabine, Moench, Ingolf, Erbe, Manuela, Haenisch, Jens, Holzapfel, Bernhard, Drechsler, Stefan-Ludwig, Efremov, Dmitri V.
Publikováno v:
Scientific Reports 6, 28390 (2016)
The Hall effect is a powerful tool for investigating carrier type and density. For single-band materials, the Hall coefficient is traditionally expressed simply by $R_H^{-1} = -en$, where $e$ is the charge of the carrier, and $n$ is the concentration
Externí odkaz:
http://arxiv.org/abs/1606.02865
Publikováno v:
Phys. Rev. B 93, 174516 (2016)
We analyze the interplay between superconductivity and the formation of bound pairs of fermions (BCS-BEC crossover) in 2D models of interacting fermions with small Fermi energy EF and weak attractive interaction, which extends to energies well above
Externí odkaz:
http://arxiv.org/abs/1601.01678
Publikováno v:
Phys. Rev. B 77, 220401(R), (2008)
We consider an ordered ferromagnet in the vicinity of a T=0 transition into a paramagnet. We show that the free energy and the transverse and longitudinal static susceptibilities contain non-analyticities which destroy a continuous second-order trans
Externí odkaz:
http://arxiv.org/abs/0804.2736
Autor:
Klemm, Richard A., Efremov, Dmitri V.
Publikováno v:
Phys. Rev. B 77, 184410 (2008).
We study single-ion and exchange anisotropy effects in equal-spin $s_1$ tetramer single molecule magnets exhibiting $T_d$, $D_{4h}$, $D_{2d}$, $C_{4h}$, $C_{4v}$, or $S_4$ ionic point group symmetry. We first write the group-invariant quadratic singl
Externí odkaz:
http://arxiv.org/abs/0712.2518
Autor:
Klemm, Richard A., Efremov, Dmitri V.
Publikováno v:
Phys. Rev. B 77, 184410 (2008).
For equal-spin $s_1$ tetramer single molecule magnets with ionic point groups $g=T_d, D_{4h}, D_{2d}, C_{4h}, C_{4v}$, and $S_4$, we write the group-invariant single-ion, Dzaloshinskii-Moriya, and symmetric anisotropic near-neighbor and next-nearest-
Externí odkaz:
http://arxiv.org/abs/cond-mat/0610084